/**
 * Copyright 2011 Honeywell Federal Manufacturing & Technologies, LLC. This material was produced under U.S. Government
 * contract DE-ACO4-01AL66850, Honeywell Federal Manufacturing & Technologies, LLC, (FM&T) with the U. S. Department of
 * Energy for the operation of the Kansas City Plant . The U.S. Government has rights to use, reproduce, and distribute
 * this software.  NEITHER THE GOVERNMENT NOR Honeywell Federal Manufacturing & Technologies, LLC, MAKES ANY WARRANTY,
 * EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE.  If software is modified to produce
 * derivative works, such modified software should be clearly marked, so as not to confuse it with the version available
 * from FM&T.
 *
 * Additionally, this program is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License Version 3 published by the Free Software Foundation. Accordingly, this program is distributed in
 * the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this library.
 * If not, see http://www.gnu.org/licenses/.
 */
package org.braintrain.services.util.domContentWorkers;

import org.braintrain.domain.Navigation;
import org.braintrain.domain.ResourceReference;
import org.braintrain.services.util.DOMContentParser;
import org.braintrain.tapestry.encoders.ContentServiceEncoder;

public class AnchorValidator extends AbstractNullCheckingAttributeValidator {
        
    private DOMContentParser domParser;

    public AnchorValidator(DOMContentParser domParser)
    {
        this.domParser = domParser;
    }
    
    /**
     * Checks for the allowable anchor tag: '#'*
     * (anchor to another spot on the current page)
     * @param node
     * @return
     */
    protected void processAttributeValue(String nodeValue) {

        int poundIndex = nodeValue.indexOf('#');
        if(poundIndex != -1)
        {
            //starts with #
            if(poundIndex == 0)
            {
                setNodeValue(domParser.generatePagePath() + nodeValue);
            }
            //link with #
            else
            {
                Object[] params = domParser.getDataSqueezer().unsqueeze(ContentServiceEncoder.parsePagePath(nodeValue));
                
                if(params != null && params.length > 1 && params[1] instanceof Long)   
                {
                    Navigation navigation = domParser.getGenericDAO().getById(Navigation.class, (Long)params[1]);
                    
                    if(params.length > 2)
                    {
            
                        if(navigation != null)
                        {
                            domParser.getReferences().add(new ResourceReference(navigation));
                        }
                    }
                    else
                    {
                        setNodeValue(domParser.generatePagePath() + nodeValue.substring(poundIndex));
                    }
                }
            }
        }
    }
}

